opencv录制视频

opencv录制视频

#include <highgui/highgui.hpp>
#include <cv.h>

using namespace std;
using namespace cv;

int main(int argc, char *argv[])
{
	CvCapture* capture = cvCaptureFromCAM(0);

	int FrameW = 320;
	int FrameH = 240;
	IplImage *FrameCopy = cvCreateImage(cvSize(FrameW, FrameH), 8, 3);

	if (!capture)
	{
		cout << "Can not open the camera." << endl;
		system("pause");
		return -1;
	}

	auto frame = cvQueryFrame(capture);

	CvVideoWriter* video = cvCreateVideoWriter("P15.avi",
		CV_FOURCC('M', 'J', 'P', 'G'),		//这一位控制是否弹出视频设置窗口,-1为弹出设置界面
		8,
		cvSize(FrameW, FrameH)); //创建CvVideoWriter对象并分配空间
	//保存的文件名为camera.avi，编码要在运行程序时选择，大小就是摄像头视频的大小，帧频率是32
	if (video) //如果能创建CvVideoWriter对象则表明成功
	{
		cout << "视频写入对象已创建." << endl;
	}
	cvNamedWindow("Camera Video", 1); //新建一个窗口
	while (1)
	{
		frame = cvQueryFrame(capture); //从CvCapture中获得一帧
		if (!frame)
		{
			cout << "无法获得视频幀." << endl;
			break;
		}

		cvResize(frame, FrameCopy, 1);

		if (cvWriteFrame(video, FrameCopy)) {//判断是否写入成功，如果返回的是1，表示写入成功
			cout << "写入ok" << endl;
		}
		cvShowImage("Camera Video", frame); //显示视频内容的图片
		if (cvWaitKey(2) > 0) break; //有其他键盘响应，则退出
	}
	cvReleaseVideoWriter(&video);
	
	cvReleaseCapture(&capture);
	cvReleaseImage(&FrameCopy);
	cvDestroyWindow("Camera Video");

	return 0;

}